Well, of course it knew the author. I'm sure you can ask just about any LLM who the author of the DRA is and it will answer Wang et al. without even having to google or follow the tinyurl link. And certainly it would also know that the algorithm is supposed to compute rotation minimizing frames.
Not sarcastic at all. it just doesn't seem like a big deal if you have played with LLMs and realize just how much LLMs know. The double reflection paper is not particularly obscure. (Incidentally I just asked Claude a couple of weeks ago about implementing rotation-minimizing frames!)